Annotation of embedaddon/ipsec-tools/src/libipsec/ipsec_dump_policy.c, revision 1.1.1.1
1.1 misho 1: /* $NetBSD: ipsec_dump_policy.c,v 1.9 2010/12/03 15:01:11 tteras Exp $ */
2:
3: /* Id: ipsec_dump_policy.c,v 1.10 2005/06/29 09:12:37 manubsd Exp */
4:
5: /*
6: * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. Neither the name of the project nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: */
33:
34: #ifdef HAVE_CONFIG_H
35: #include "config.h"
36: #endif
37:
38: #include <sys/types.h>
39: #include <sys/param.h>
40: #include <sys/socket.h>
41:
42: #include <netinet/in.h>
43: #include PATH_IPSEC_H
44:
45: #include <arpa/inet.h>
46:
47: #include <stdio.h>
48: #include <stdlib.h>
49: #include <string.h>
50: #include <netdb.h>
51:
52: #include "ipsec_strerror.h"
53: #include "libpfkey.h"
54:
55: static const char *ipsp_dir_strs[] = {
56: "any", "in", "out", "fwd",
57: #ifdef __linux__
58: "in(socket)", "out(socket)"
59: #endif
60: };
61:
62: static const char *ipsp_policy_strs[] = {
63: "discard", "none", "ipsec", "entrust", "bypass",
64: };
65:
66: static char *ipsec_dump_ipsecrequest __P((char *, size_t,
67: struct sadb_x_ipsecrequest *, size_t, int));
68: static char *ipsec_dump_policy1 __P((void *, const char *, int));
69: static int set_addresses __P((char *, size_t, struct sockaddr *,
70: struct sockaddr *, int));
71: static char *set_address __P((char *, size_t, struct sockaddr *, int));
72:
73: /*
74: * policy is sadb_x_policy buffer.
75: * Must call free() later.
76: * When delimiter == NULL, alternatively ' '(space) is applied.
77: */
78: char *
79: ipsec_dump_policy(policy, delimiter)
80: ipsec_policy_t policy;
81: __ipsec_const char *delimiter;
82: {
83: return ipsec_dump_policy1(policy, delimiter, 0);
84: }
85:
86: char *
87: ipsec_dump_policy_withports(policy, delimiter)
88: void *policy;
89: const char *delimiter;
90: {
91: return ipsec_dump_policy1(policy, delimiter, 1);
92: }
93:
94: static char *
95: ipsec_dump_policy1(policy, delimiter, withports)
96: void *policy;
97: const char *delimiter;
98: int withports;
99: {
100: struct sadb_x_policy *xpl = policy;
101: struct sadb_x_ipsecrequest *xisr;
102: size_t off, buflen;
103: char *buf;
104: char isrbuf[1024];
105: char *newbuf;
106:
107: #ifdef HAVE_PFKEY_POLICY_PRIORITY
108: int32_t priority_offset;
109: char *priority_str;
110: char operator;
111: #endif
112:
113: /* sanity check */
114: if (policy == NULL)
115: return NULL;
116: if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
117: __ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
118: return NULL;
119: }
120:
121: /* set delimiter */
122: if (delimiter == NULL)
123: delimiter = " ";
124:
125: #ifdef HAVE_PFKEY_POLICY_PRIORITY
126: if (xpl->sadb_x_policy_priority == 0)
127: {
128: priority_offset = 0;
129: priority_str = "";
130: }
131: /* find which constant the priority is closest to */
132: else if (xpl->sadb_x_policy_priority <
133: (u_int32_t) (PRIORITY_DEFAULT / 4) * 3)
134: {
135: priority_offset = xpl->sadb_x_policy_priority - PRIORITY_HIGH;
136: priority_str = "prio high";
137: }
138: else if (xpl->sadb_x_policy_priority >=
139: (u_int32_t) (PRIORITY_DEFAULT / 4) * 3 &&
140: xpl->sadb_x_policy_priority <
141: (u_int32_t) (PRIORITY_DEFAULT / 4) * 5)
142: {
143: priority_offset = xpl->sadb_x_policy_priority - PRIORITY_DEFAULT;
144: priority_str = "prio def";
145: }
146: else
147: {
148: priority_offset = xpl->sadb_x_policy_priority - PRIORITY_LOW;
149: priority_str = "prio low";
150: }
151:
152: /* fix sign to match the way it is input */
153: priority_offset *= -1;
154: if (priority_offset < 0)
155: {
156: operator = '-';
157: priority_offset *= -1;
158: }
159: else
160: {
161: operator = '+';
162: }
163: #endif
164:
165: switch (xpl->sadb_x_policy_dir) {
166: case IPSEC_DIR_ANY:
167: case IPSEC_DIR_INBOUND:
168: case IPSEC_DIR_OUTBOUND:
169: #ifdef HAVE_POLICY_FWD
170: case IPSEC_DIR_FWD:
171: case IPSEC_DIR_FWD + 1:
172: case IPSEC_DIR_FWD + 2:
173: #endif
174: break;
175: default:
176: __ipsec_errcode = EIPSEC_INVAL_DIR;
177: return NULL;
178: }
179:
180: switch (xpl->sadb_x_policy_type) {
181: case IPSEC_POLICY_DISCARD:
182: case IPSEC_POLICY_NONE:
183: case IPSEC_POLICY_IPSEC:
184: case IPSEC_POLICY_BYPASS:
185: case IPSEC_POLICY_ENTRUST:
186: break;
187: default:
188: __ipsec_errcode = EIPSEC_INVAL_POLICY;
189: return NULL;
190: }
191:
192: buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir])
193: + 1 /* space */
194: #ifdef HAVE_PFKEY_POLICY_PRIORITY
195: + strlen(priority_str)
196: + ((priority_offset != 0) ? 13 : 0) /* [space operator space int] */
197: + ((strlen(priority_str) != 0) ? 1 : 0) /* space */
198: #endif
199: + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
200: + 1; /* NUL */
201:
202: if ((buf = malloc(buflen)) == NULL) {
203: __ipsec_errcode = EIPSEC_NO_BUFS;
204: return NULL;
205: }
206: #ifdef HAVE_PFKEY_POLICY_PRIORITY
207: if (priority_offset != 0)
208: {
209: snprintf(buf, buflen, "%s %s %c %u %s",
210: ipsp_dir_strs[xpl->sadb_x_policy_dir], priority_str, operator,
211: priority_offset, ipsp_policy_strs[xpl->sadb_x_policy_type]);
212: }
213: else if (strlen (priority_str) != 0)
214: {
215: snprintf(buf, buflen, "%s %s %s",
216: ipsp_dir_strs[xpl->sadb_x_policy_dir], priority_str,
217: ipsp_policy_strs[xpl->sadb_x_policy_type]);
218: }
219: else
220: {
221: snprintf(buf, buflen, "%s %s",
222: ipsp_dir_strs[xpl->sadb_x_policy_dir],
223: ipsp_policy_strs[xpl->sadb_x_policy_type]);
224: }
225: #else
226: snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir],
227: ipsp_policy_strs[xpl->sadb_x_policy_type]);
228: #endif
229:
230: if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
231: __ipsec_errcode = EIPSEC_NO_ERROR;
232: return buf;
233: }
234:
235: /* count length of buffer for use */
236: off = sizeof(*xpl);
237: while (off < PFKEY_EXTLEN(xpl)) {
238: xisr = (void *)((caddr_t)(void *)xpl + off);
239: off += xisr->sadb_x_ipsecrequest_len;
240: }
241:
242: /* validity check */
243: if (off != PFKEY_EXTLEN(xpl)) {
244: __ipsec_errcode = EIPSEC_INVAL_SADBMSG;
245: free(buf);
246: return NULL;
247: }
248:
249: off = sizeof(*xpl);
250: while (off < PFKEY_EXTLEN(xpl)) {
251: int offset;
252: xisr = (void *)((caddr_t)(void *)xpl + off);
253:
254: if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr,
255: PFKEY_EXTLEN(xpl) - off, withports) == NULL) {
256: free(buf);
257: return NULL;
258: }
259:
260: offset = strlen(buf);
261: buflen = offset + strlen(delimiter) + strlen(isrbuf) + 1;
262: newbuf = (char *)realloc(buf, buflen);
263: if (newbuf == NULL) {
264: __ipsec_errcode = EIPSEC_NO_BUFS;
265: free(buf);
266: return NULL;
267: }
268: buf = newbuf;
269: snprintf(buf+offset, buflen-offset, "%s%s", delimiter, isrbuf);
270:
271: off += xisr->sadb_x_ipsecrequest_len;
272: }
273:
274: __ipsec_errcode = EIPSEC_NO_ERROR;
275: return buf;
276: }
277:
278: static char *
279: ipsec_dump_ipsecrequest(buf, len, xisr, bound, withports)
280: char *buf;
281: size_t len;
282: struct sadb_x_ipsecrequest *xisr;
283: size_t bound; /* boundary */
284: int withports;
285: {
286: const char *proto, *mode, *level;
287: char abuf[NI_MAXHOST * 2 + 2];
288:
289: if (xisr->sadb_x_ipsecrequest_len > bound) {
290: __ipsec_errcode = EIPSEC_INVAL_PROTO;
291: return NULL;
292: }
293:
294: switch (xisr->sadb_x_ipsecrequest_proto) {
295: case IPPROTO_ESP:
296: proto = "esp";
297: break;
298: case IPPROTO_AH:
299: proto = "ah";
300: break;
301: case IPPROTO_IPCOMP:
302: proto = "ipcomp";
303: break;
304: default:
305: __ipsec_errcode = EIPSEC_INVAL_PROTO;
306: return NULL;
307: }
308:
309: switch (xisr->sadb_x_ipsecrequest_mode) {
310: case IPSEC_MODE_ANY:
311: mode = "any";
312: break;
313: case IPSEC_MODE_TRANSPORT:
314: mode = "transport";
315: break;
316: case IPSEC_MODE_TUNNEL:
317: mode = "tunnel";
318: break;
319: default:
320: __ipsec_errcode = EIPSEC_INVAL_MODE;
321: return NULL;
322: }
323:
324: abuf[0] = '\0';
325: if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
326: struct sockaddr *sa1, *sa2;
327: caddr_t p;
328:
329: p = (void *)(xisr + 1);
330: sa1 = (void *)p;
331: sa2 = (void *)(p + sysdep_sa_len(sa1));
332: if (sizeof(*xisr) + sysdep_sa_len(sa1) + sysdep_sa_len(sa2) !=
333: xisr->sadb_x_ipsecrequest_len) {
334: __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
335: return NULL;
336: }
337: if (set_addresses(abuf, sizeof(abuf),
338: sa1, sa2, withports) != 0) {
339: __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
340: return NULL;
341: }
342: }
343:
344: switch (xisr->sadb_x_ipsecrequest_level) {
345: case IPSEC_LEVEL_DEFAULT:
346: level = "default";
347: break;
348: case IPSEC_LEVEL_USE:
349: level = "use";
350: break;
351: case IPSEC_LEVEL_REQUIRE:
352: level = "require";
353: break;
354: case IPSEC_LEVEL_UNIQUE:
355: level = "unique";
356: break;
357: default:
358: __ipsec_errcode = EIPSEC_INVAL_LEVEL;
359: return NULL;
360: }
361:
362: if (xisr->sadb_x_ipsecrequest_reqid == 0)
363: snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level);
364: else {
365: int ch;
366:
367: if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX)
368: ch = '#';
369: else
370: ch = ':';
371: snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level,
372: ch, xisr->sadb_x_ipsecrequest_reqid);
373: }
374:
375: return buf;
376: }
377:
378: static int
379: set_addresses(buf, len, sa1, sa2, withports)
380: char *buf;
381: size_t len;
382: struct sockaddr *sa1;
383: struct sockaddr *sa2;
384: int withports;
385: {
386: char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST];
387:
388: if (set_address(tmp1, sizeof(tmp1), sa1, withports) == NULL ||
389: set_address(tmp2, sizeof(tmp2), sa2, withports) == NULL)
390: return -1;
391: if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len)
392: return -1;
393: snprintf(buf, len, "%s-%s", tmp1, tmp2);
394: return 0;
395: }
396:
397: static char *
398: set_address(buf, len, sa, withports)
399: char *buf;
400: size_t len;
401: struct sockaddr *sa;
402: int withports;
403: {
404: const int niflags = NI_NUMERICHOST | NI_NUMERICSERV;
405: char host[NI_MAXHOST];
406: char serv[NI_MAXSERV];
407:
408: if (len < 1)
409: return NULL;
410: buf[0] = '\0';
411: if (getnameinfo(sa, (socklen_t)sysdep_sa_len(sa), host, sizeof(host),
412: serv, sizeof(serv), niflags) != 0)
413: return NULL;
414:
415: if (withports)
416: snprintf(buf, len, "%s[%s]", host, serv);
417: else
418: snprintf(buf, len, "%s", host);
419:
420: return buf;
421: }
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